I have recently joined this board and I pulled out half my hair trying to solve the puzzles, and FINALLY, I got where I could easily solve the 4x4's and with some work, solve most of the 4x5's. The new ones have made me bald. I cannot solve ONE of them. I guess its a learning curve. I really do NOT like them right now, and I am studying the new tutorial for these puzzles (on YouTube by Puzzle Baron). I guess it just takes time and effort.